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DRAFT REGULATOR FOR LOGOMOTIVES.

Patented Nov. 10,4896` 3 Sheets-Sheet 3. H DBGB-NER 8v R.'DEISSLER. l ffDRAFT REGULATOR FOR LOCOMOTIVES.

No. 570,983. 'Patented NOV. 10,1896.

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UNITED STATES PATENT OFFICE.

HEINRICH DEGENER, OF RUMMELSBURG, AND ROBRT DEISSLEROF TREP- TOIV,GERMANY; SAID DEGENER ASSIGNOR TO SAID DEISSLER.

,-DRAFT-REGULATOR FOR LOCOMOTIVES.

SPECIFICATION formingpart of Letters Patent No. 570,983, dated November1.0, 1896.

Application tiled June 27, 1895. VSerial No. 554,228. (No model.)Patentedin Germany July 8, 1894,1To. 79,758, and iny England November7,1894.,No. 21,386.

To a/ZZ whom zit may concern.-

Be it known that we, HEINRICH DEGENER, a resident of Rummelsburg, nearBerlin, and -ROBERT DEISSLER, a resident of Treptow, near Berlin, in theKingdom of Prussia, German Empire, subjects of the King of Prussia,German Emperor, have invented an Improved Draft-Regulator forLocomotives, (for which patents have been obtained in Germany, No.

. I'o 79,758, dated July 8, 1894, and in Great Britain, No. 21,386,dated November 7, 1894,) of which the following is an eXactspeciiication.

The blast-steam of locomotive-engines is, as is known, used in the samefor producing the draft for the furnace. Said draft is dependent on thequantity of the blast-steam as Well as on the velocity of the same, andboth quantity and velocity of the blast-steam are in their turndependent, first, on the quantity of live steam with which the cylindersare charged at each stroke of their respective pistons, and, second, onthe speed ofthe locomotive-engine.

If the quantity of live steam with which the cylinders at each stroke'are charged is but slight or of average or normal magnitude, thequantity of waste steam resulting from that live steam is just as greatas to produce the required draft for the furnace, and the fuel will beproperlyT burned and exhausted; but if the cylinders are filled withlive steam up Y to a rather great percentage, say seventy per cent., thedraft becomes so strong a one that unburned particles of fuel are tornaway 3 5 from the grate and carried away through the smoke-stack, sogreat a percentage of live steam is necessary if an ascent is to beovercome, or if the train is along or heavy one, or if a train isstarted. There is thus in either of these cases a loss of fuel caused bysaid strong draft. Lessening the latter by athrottlc-valve arrangedWithin the smoke-stack is not an advantageous means, but adisadvantageous one, in that there is then diminished the Way not forthe furnace-gases only, but for the waste steam, too. The latter wouldthus cause an increase of the counter-pressure Within the cylinders, andthe gain attained on one side would be lost on the other. The purpose ofour invention, therefore, is

to obviate the said losses of fuel Without causing the Waste steam toreact in the manlner just explained, and in order to make our inventionmore clear we refer to the accompanying drawings, in which similarletters refer to similar parts throughout the different views, and inWhich- Figure 1 -is a vertical section through the smoke-box andsmoke-stack of a locomotiveengine provided with our improved draft- 6oregulator. Fig. 2 is ahorizontal section taken on line 10 11 of Fig. 1.Fig. 3 is a vertical sect-ion through a modified form of construction.Fig. 4 is a horizontal section taken on` line 12 13 of Fig. 3. Fig. 5 isa vertical sec- 65 tion through'another mode of construction, and Fig.-6 is a horizontal section taken on line 14 l5 of Fig. 5. y

Our improved draft-regulator consists in general of a casing surroundingthe blast- 7o nozzle and arranged partly Within the smokebox and partlyWithin the chimney in such a manner that the Waste steam may freelyescape into the stack, While either the whole of the furnace-gases or acertain portion thereof is compelled to pass through apertures providedin the mantle or Wall of the said casing. Said apertures may be partlyor Wholly closed, so that the sucking action of the'blaststeam upon theair or the furnace-gases, re- 8o spectively, is correspondingly altered.The blast itself is not affected at all by that casing, but the flow offurnace-gases through the apertures of the same is either lessened orperfectly hindered, according to the position of 8 5 the part or partseffecting the closing.

Referring to Figs. 1 and 2, a designates a fixed casing that issupported by a circular plate d, held by the nozzle B, and extendsupward as far as to touch the Walls of the 9o smoke-stack A. Said casingis provided with a few large apertures a', and is encompassed by anannular slide b, that may be moved in vertical direction by means of achain f by the mediation of a three-armed connectingpiece g.

The free surfaces of the apertures a combined are at least equal to thefree section of the smoke-stack A at the narrowest part of the same, andthere is thus no throttling What- Ioo ever of the furnace-gases as longas the apertures of the casing @remain perfectly opened. If, however,the slide b is raised up to a certain height, the apertures d will thenbe covered or closed to a corresponding extent, and the sucking actionof the blast-steam will therefore be correspondingly altered, as aboveexplained. The apertures a' of the casing Co do not, however, form theonly way for the furnace-gases, but there are some apertures d providedin the plate d. It is thus to be seen that a certain draft is left evenif the apertures a are perfectly closed.

We prefer to construct our improved draftregulator in such a manner thatthere exits besides the regulable passage for the furnacegases also anon-regulable one, CZ', Figs. l and 2, the latter being, however, alwaysof such a section that the draft thereby allowed is y lator is then tocome into operation in those cases only in which a greater than thenormal quantity is necessary. Ve have shown two of such constructions inFigs. 3 to 6, in which the cylinder Co extends upward into thesmokestack A, but leaves (in contradistinction to the other mode ofconstruction, Figs. 1 and 2) an annular channel e between itself and thesmoke-stack. Said annular channel is the constantly-remaining,non-regulable passage for the furnace-gases, while the interior of thecylinder a forms the regulable one. The ring or slide l) is in Figs. 3and 4E situated outside the cylinder a, and must be raised in' order toclose the apertures a. In Figs. 5 and 6 the ring b is situated insidethe cylinder ct and is to be lowered if the apertures a are to beclosed. XVe prefer to suspend the ring b by a chain f and a three-armedconsteel band, a rigid rod, or the like may as well be used.

Having thus fully described the nature of ourinvention, what we desireto secure by Letters Patent of the United States is 1. In alocomotive-engine, the combination with the chimney, and with ablast-nozzle arranged in the proximity of said chimney, of a verticalslide surrounding said nozzle, and a guide for said slide; said guideextending from the nozzle up into the chimney, and having a few largeapertures the combined free sections of which are at least as great asthe free horizontal section of the said guide; said slide being adapt-edto narrow said apertures, for the purpose as described.

2. In a locomotive-engine h-aving a portion of its chimney contracted,the combination HEINRICH DEGENER. ROBERT DEISSLER.

lVitnesses CHAs. M. DAY, WM. HAUPT.

